thomas.shaffer@LIGO.ORG - posted 17:41, Sunday 25 June 2017 - last comment - 18:50, Sunday 25 June 2017(37119)
Lockloss @ 00:17 UTC
The control signals started ringing up for the past 40min or so. They got to the point where I felt like we were going to lose it any second. CSOFT P and CHARD P seemed to be rung up the most, so in an act of desperation I went to ramp down the gain on those one at a time. It didn't work.
There are no obvious clues to me as to why the control loops started to ring up. I attached the lockloss plot and some trends
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Back to Observing 01:09 UTC
The instability continues, but doesn't seem to be getting worse to the point of lock loss. It is hurting our range as we are now down to 56Mpc.